direct static method invokation within an abstract class

<?php

abstract class A
{
    protected static $something;

    abstract static function init();

    static function doSomeWork() {
        echo static::$something;
    }
}

class B extends A
{
    static function init() {
        static::$something = 'something else';
    }
}

// hiding implementation detail; may be DIC or something else
class_alias('A', 'OurImplementation');

OurImplementation::init();
OurImplementation::doSomeWork();